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ioat: fix 'ack' handling, driver must ensure that 'ack' is zero

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Initialize 'ack' to zero in case the descriptor has been recycled.

Prevents "kernel BUG at crypto/async_tx/async_xor.c:185!"

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Cc: stable@kernel.org
This commit is contained in:
Dan Williams 2008-03-01 07:52:14 -07:00
parent ec8670f1f7
commit 6497dcffe0
1 changed files with 2 additions and 0 deletions
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2
drivers/dma/ioat_dma.c
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@ -714,6 +714,7 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy(
new->len = len; new->len = len;
new->dst = dma_dest; new->dst = dma_dest;
new->src = dma_src; new->src = dma_src;
new->async_tx.ack = 0;
return &new->async_tx; return &new->async_tx;
} else } else
return NULL; return NULL;
@ -741,6 +742,7 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
new->len = len; new->len = len;
new->dst = dma_dest; new->dst = dma_dest;
new->src = dma_src; new->src = dma_src;
new->async_tx.ack = 0;
return &new->async_tx; return &new->async_tx;
} else } else
return NULL; return NULL;